/Engine/Source/Runtime/Engine/Public/BoneContainer.h
Returns true if bone is child of for current asset.
bool BoneIsChildOf ( const [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex) & BoneIndex, const [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex) & ParentBoneIndex ) const